Finally, they investigate how language and meaning relate to truth and the world.Philosophers tend to be less concerned with which sentences are actually true, and more with what kinds of meanings can be true or false.
In the dialogue Cratylus, Plato considered the question whether the names of things were determined by convention or by nature.
He criticized conventionalism because it leads to the bizarre consequence that anything can be conventionally denominated by any name.
Hence it cannot account for the correct or incorrect application of a name.
He claimed that there was a natural correctness to names.
To do this, he pointed out that compound words and phrases have a range of correctness.
He also argued that primitive names (or morphemes) had a natural correctness, because each phoneme represented basic ideas or sentiments.
For example, the letter and sound of "l" for Plato represented the idea of softness.
However, by the end of the Cratylus, he had admitted that some social conventions were also involved, and that there were faults in the idea that phonemes had individual meanings.
Aristotle concerned himself with the issues of logic, categories, and meaning creation.
He separated all things into categories of species and genus.
He thought that the meaning of a predicate was established through an abstraction of the similarities between various individual things.